package ExperimentFour.Observer;

import java.util.ArrayList;

/**
 * @author 北巷_东坡
 * @date 2022/11/15 20:22
 * @computer 10741
 */
public abstract class StockSubject206 {
    protected ArrayList arrayList= new ArrayList();
    public void attach(IncestorObserver206 inc){
        arrayList.add(inc);
    }
    public abstract void notice(int change);
}
